SPRZ447D July   2017  – February 2021 AM5746 , AM5748 , AM5749

 

  1. 1Introduction
    1.     Related Documentation
    2.     Trademarks
    3.     Modules Impacted
  2. 2Silicon Advisories
    1.     Revisions SR 1.0 - Advisories List
    2.     i202
    3.     i378
    4.     i631
    5.     i694
    6.     i698
    7.     i699
    8.     i709
    9.     i727
    10.     i729
    11.     i734
    12.     i767
    13.     i782
    14.     i783
    15.     i802
    16.     i803
    17.     i807
    18.     i808
    19.     i809
    20.     i810
    21.     i813
    22.     i814
    23.     i815
    24.     i818
    25.     i819
    26.     i820
    27.     i824
    28.     i826
    29.     i829
    30.     i834
    31.     i849
    32.     i856
    33.     i862
    34.     i863
    35.     i869
    36.     i870
    37.     i871
    38.     i872
    39.     i874
    40.     i878
    41.     i879
    42.     i883
    43.     i889
    44.     i890
    45.     i893
    46.     i896
    47.     i897
    48.     i898
    49.     i899
    50.     i900
    51.     i903
    52.     i904
    53.     i916
    54.     i929
    55.     i930
    56.     i932
    57.     i933
    58.     i936
    59.     i940
  3. 3Silicon Limitations
    1.     Revisions SR 1.0 - Limitations List
    2.     i596
    3.     i641
    4.     i833
    5.     i838
    6.     i845
    7.     i848
    8.     i876
    9.     i877
    10.     i892
    11.     i909
    12.     i925
  4. 4Silicon Cautions
    1.     Revisions SR 1.0 - Cautions List
    2.     i827
    3.     i832
    4.     i836
    5.     i839
    6.     i864
    7.     i885
    8.     i886
    9.     i912
    10.     i926
    11.     i931
    12.     i935
    13.     i937
  5. 5Revision History

i871

L4_PER3 Firewall Initiator ConnID Value Left-Shift 1-Bit

CRITICALITY

Low

DESCRIPTION

The initiator ConnID value is used for configuring Firewall to setup the protection of target IPs. The Technical Reference Manual Table "L4 ConnID Definition" is correct for L4_CFG, L4_PER1, L4_PER2, and L4_WKUP. However, the L4_PER3 initiator ConnID value propagated from L3 interconnect is left-shifted by 1-bit comparing to the other L4 instances. As a result, the L4_PER3 firewall uses ConnIDx2 to determine the permission of each initiator accessing L4_PER3 targets. L4_PER3 firewall also logs error with ConnIDx2 value when violations occur.

Due to ConnID value left-shifted by 1-bit, the default Protection Group Member, defined by L4_AP_PROT_GROUP_MEMBERS_0_L register, will only enable the initiators with ConnID < 8 for L4_PER3 access since the upper 16-bits are all 0s after reset. The initiators with ConnID >= 8 won't be able access L4_PER3 targets out of reset. User has to program the protection group register to enable the access to L4_PER3 targets for those initiators.

WORKAROUND

To configure the L4_PER3 firewall protection correctly, use ConnIDx2 to program protection group and identify the initiator that caused the error. Refer to the below table for L4_PER3 ConnID values.

Table 2-2 ConnID Values
ConnID per TRM (hex)ConnID For L4_PER3 FW (decimal)CONNID_BIT_VECTOR For L4_PER3 FWInitiator(1)
00BIT 0Cortex-A15 MPU subsystem
12BIT 2Debug subsystem
24BIT 4DSP1 subsystem (CFG, EDMA, MDMA), DSP2 (EDMA)
36BIT 6IVAHD, DSP2 (CGF, MDMA)
48BIT 8EVE1, EVE2, EVE3, EVE4
510BIT 10PRU-ICSS1, PRU-ICSS2
612BIT 12IPU1/2, SYSTEM_DMA
714BIT 14EDMA
816BIT 16DSS, MLB, MMU1, MMU2, PCIE1 and PCIE2
918BIT 18VIP1, VIP2, VIP3, VPE
A20BIT 20MMC1, MMC2, GPU, BB2D, GMAC
B22BIT 22USB1, USB2, USB3, USB4
C24BIT 24SATA

(1) For the list of active initiators and supported modules, please refer to the specific Device TRM and Device Data Manual.

REVISIONS IMPACTED

AM574x SR 1.0
AM576x SR 1.0

AM574x: 1.0

DRA75xP, DRA74xP, DRA77xP, DRA76xP: 1.0

TDA2Px: 1.0

AM576x: 1.0